The city of Midgard has faced extreme weather conditions in recent years. Causing huge floods everywhere. Lord In$,$ the ruler of Midgard, wanted to know how much water could be stored in each area. What height?

The city of Midgard had water walls on many levels.

by

a$.$ The data for the height of the retaining wall is in the form of array $[$ h$]$

b$.$ Each h indicates the height of the water wall.

Example :

a$.$ Input:$[3,5,4,5,2]$

Output : $[3,5,5,2]$

b$.$ Input:$[6,5,4,1,3,2]$

Output : $[5,4,3,3,2]$

Write the solution in python code.